Miscellaneous active electrical nonlinear devices – circuits – and – Specific input to output function – Combining of plural signals
Patent
1996-06-28
1998-08-04
Wells, Kenneth B.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific input to output function
Combining of plural signals
327362, 327363, 331 56, G06G 712
Patent
active
057899614
ABSTRACT:
The invention exploits the phenomenon of stochastic resonance in a nonlinear dynamic system to enhance the system's response to a weak periodic signal locally corrupted by background noise. The invention is designed to enhance the signal-to-noise ratio (SNR) in the system's output power spectrum at the periodic signal's frequency. This technique utilizes an array of nonlinear dynamic elements whose individual outputs are specifically coupled to other array elements. The coupling is found to substantially enhance the output SNR over what would be expected from a signal processor based upon a single such element. This principle has the potential to substantially enhance the performance of arrays of nonlinear devices; in fact, the nonlinear array can be expected to yield an output SNR that is very close to that obtainable by an array of ideal linear devices, so that the coupling actually "linearizes" the nonlinear system. The output SNR enhancement is found to correlate with enhanced signal detection performance.
REFERENCES:
patent: 5574369 (1996-11-01), Hibbs
Lindner et al., "Array Enhanced Stochastic Resonance and Spatiotemporal Shronization", Physical Review Letters, vol. 75, No. 1, 3 Jul. 1995, pp. 3-6.
Moss, "Stochastic Resonance: A Signal + Noise in a Two State System", Forty-fifth Annual Symposium on Frequency Control, 1991, pp. 649-658.
Lindner et al., "Scaling laws for spatiotemporal synchronization and array enhanced stochastic resonance", Physical Review E, vol. 53, No. 3, Mar. 1996, pp. 2081-2086.
Bulsara Adi R.
Ditto William L.
Inchiosa Mario E.
Lindner John F.
Meadows Brian K.
Fendelman Harvey
Kagan Michael A.
Lipovsky Peter A.
The United States of America as represented by the Secretary of
Wells Kenneth B.
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